Juicer is a command line tool that helps you ship frontend code for production. High level overview; Juicer can * figure out which files depend on each other and merge them together, reducing the number of http requests per page view, thus improving performance * use YUI Compressor to compress code, thus improving performance * verify that your JavaScript is safe to minify/compress by running JsLint on it * cycle asset hosts in CSS files * add "cache busters" to URLs in CSS files * recalculate relative URLs in CSS files, as well as convert them to absolute (or convert absolute URLs to relative URLs)